Windows Subsystem for Linux

Link

https://learn.microsoft.com/en-us/windows/wsl/

FAQ

Get the size of WSL distribution disks

1. Get the name of the distribution:

   wsl --list

2. Insert it in the following command to get the filename:

   (Get-ChildItem -Path HKCU:\Software\Microsoft\Windows\CurrentVersion\Lxss | Where-Object { $_.GetValue("DistributionName") -eq '<distribution-name>' }).GetValue("BasePath") + "\ext4.vhdx"

3. Check the filesize using PowerShell or Windows Explorer.

Using the Windows OpenSSH Agent from WSL

1. Install socat in the WSL distro:

sudo apt install socat

1. Install npiperelay in Windows:

choco install npiperelay

1. Insert into ~/.bashrc in the WSL distro:

# Configure ssh forwarding
export SSH_AUTH_SOCK=$HOME/.ssh/agent.sock
# need `ps -ww` to get non-truncated command for matching
# use square brackets to generate a regex match for the process we want but that doesn't match the grep command running it!
ALREADY_RUNNING=$(ps -auxww | grep -q "[n]piperelay.exe -ei -s //./pipe/openssh-ssh-agent"; echo $?)
if [[ $ALREADY_RUNNING != "0" ]]; then
    if [[ -S $SSH_AUTH_SOCK ]]; then
        # not expecting the socket to exist as the forwarding command isn't running (http://www.tldp.org/LDP/abs/html/fto.html)
        echo "removing previous socket..."
        rm $SSH_AUTH_SOCK
    fi
    echo "Starting SSH-Agent relay..."
    # setsid to force new session to keep running
    # set socat to listen on $SSH_AUTH_SOCK and forward to npiperelay which then forwards to openssh-ssh-agent on windows
    (setsid socat UNIX-LISTEN:$SSH_AUTH_SOCK,fork EXEC:"npiperelay.exe -ei -s //./pipe/openssh-ssh-agent",nofork &) >/dev/null 2>&1
fi

Source: https://stuartleeks.com/posts/wsl-ssh-key-forward-to-windows/

Enabling systemd in WSL2

• Edit /etc/wsl.conf as root:

  [boot]
  systemd=true

  • Source: Systemd support is now available in WSL!